MAINTENANCE
LAB STORAGE TANKS
24
98-0123 Rev E
9.4
Resistivity Meter Calibration
The resistivity meter should never require calibration. It is recommended to verify the accuracy of the
resistivity meter annually by comparing the value shown on the meter against a sample from the post
filter sample port and analyzing this with a known good hand meter. In the event that the reading cannot
be verified within 5% accuracy, calibration can be performed as follows.
1.
Open the access door to the electrical enclosure and remove the 4 screws on the rear of the
resistivity meter.
2.
Remove the cover and locate the calibration trimmer (Figure 6), CAL/R16, on the lower edge of
the circuit board.
3.
With the unit plugged in and running, allowing the resistivity display to stabilize.
4.
If the displayed reading on the unit differs from the handheld reading, turn the calibration
trimmer, CAL/R16, with a small fine screwdriver until the reading agrees.
5.
Replace the enclosure’s rear cover and close the electrical enclosure.
Figure 6
Resistivity Sensor Wiring
Summary of Contents for 00HC-4090
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Page 7: ...COMPONENT IDENTIFICATION LAB STORAGE TANKS 5 98 0123 Rev E 2 COMPONENT IDENTIFICATION...
Page 8: ...COMPONENT IDENTIFICATION LAB STORAGE TANKS 6 98 0123 Rev E...
Page 9: ...COMPONENT IDENTIFICATION LAB STORAGE TANKS 7 98 0123 Rev E 2 1 Flow Schematic...
Page 15: ...OPERATION LAB STORAGE TANKS 13 98 0123 Rev E Figure 3 Grundfos Eye Indicators...
Page 16: ...OPERATION LAB STORAGE TANKS 14 98 0123 Rev E 5 2 Default Pump Program...
Page 28: ...REPLACEMENT PARTS LAB STORAGE TANKS 26 98 0123 Rev E 11 REPLACEMENT PARTS...
